Goldwave will do a batch and process in the mixer effect "mono left" Sound comes from both speakers, but only what was in the left channel. Depending on the mpx setting "mono right" might be appropriate. (for 1900 songs this took about 8 hours!-computer doing the work of course, only initial setup requires a human)
This is for permanent processing, not temporary playing settings, which Microstudio does not do, but other players do. (do)
Copy and paste the cdg files and you have two sets of songs, vocal and not vocal (with the exact same name, so you have to add "vocal" or something using a renaming program, or keep everything in separate folders)
